Automatically-inflated polishing-wheel.



No. 704,509. Patented luly I5, |902.

I. P. CADMAN.

AUTOMATICALLY INFLATED POLISHlNGWHEEL.

(Application led Nov. 11, 1901.1

(No Mudd.) 2 Sheets-Sheet l,

No. 704,509. Patented luly 15,1902'.

l. P. cAnMAN. AUTOHATICALLY INFLATED PLISHING WHEEL lcatio Nov. 1 1 D1,

NTTn STATES PATENT FFICE.

ISAAC P. CADMAN, OF BELOI'I, WISCONSIN.

AUTOMATlCALLY-INFLATED POLlSHlNG-WHEEL.

SPECIFICATION forming part of Letters Patent No. 704,509, dated July 15,1902. Application led November 11| 1901. Serial No. 81,875. (No model.)

To all whom t may concern:

Be it known that I, IsAAo P. OADMAN, a citizen of the United States,residing at Beloit, in the county of Bock and State of Wisconsin, haveinvented certain new and useful Improvements in Automatically-IndatedPolishing-Vheels, of which the following is a specitlcation.

The object of this invention is the production of a pneumaticpolishing-wheel the peripheral air-cushion of which is iniiated byreason of the inertia of the air in which the wheel revolves.

In the accompanying drawings, Figure l is a side elevation of apolishing-wheel embodying the features of my invention. Fig. 2 is atransverse section on dotted line 2 2 of Fig. l. Fig. 3 is a transversecentral section through the polishing-wheel shown in Fig. 1. Fig. 4 is afragmental side view of the polishingwheel, the air-pocket beingdetached and showing the air-passage through the web of the wheel. Fig.5 is a face View, partly in section, of a modified form of my invention,showing the application of said invention to a polishing-roll. Fig. 6 isa longitudinal central section through said roll. Fig. 7 illustrates adierent form of attachment for theV cover of the wheel from that shownin Figs. l to 4, inclusive.

Like letters of reference indicate corresponding parts throughout theseveral views.

In the embodiment of this invention illustrated in Figs. l, 2, 3, and 4I provide a polishing-wheel with a peripheral Vpneumatic cushion and onthe sides of the wheel place air-tunnels connected by suitable channelswith said peripheral cushion. Inwardly-opening valves'are placed in saidchannels to prevent the escape of air from the cushion. In theconstruction of this polishing-wheel I provide the wheel A, having thecentral hub A', the peripheral rim A2, the intermediate web A3, thegroove A4 in the face of the peripheral rim A2, and the peripheral ribsA at each side of the rim. On one side of the wheel and secured to theweb A3 are two air-tunnels A6, the open sides or mouths of which open inopposite directions. Within the mouth of each of these tunnels a sharprib A7 projects from the web A3 of the wheel to divide the aircurrententering the funnels, causing a part of said current to pass through theair-port AS, extending through the web of the wheel, from whence itescapes on the opposite side of said web. The other part of saidair-current passes from the funnel into the air-port A, and, openingtheflat valve A10, enters the pocket A11, formed on the opposite side ofthe web A3. From this pocket the air is forced through the air-duct A12,and, passing the airvalve A13, enters the air-chamberA11, formed uponthe periphery of said wheel. A cover B, of leather, oiled canvas, orother substance reasonably tight in its texture, in ring form is adaptedto be slipped over the peripheral ribs A5 of the wheel A and its edgesheld against the outer sides of said ribs by the annular rings B,secured to the periphery of the wheel A by means of screws B2 or in anyother suitable manner. In Fig. 7 the covering B is illustrated as beingheld in position by spring-rin gs b3, iittinginto annular grooves a2,formed integralrwith the peripheral rim of the wheel. This is merely adifferent and perhaps simpler means for holding the cover in position,although possibly not as secure as that illustrated in Figs. 1 to 4,inclusive.

Figs. 5 and 6 illustrate the application of my invention to apolishing-drum. The peripheral groove A1 of the wheel is present in theroll or drum in helical form and in duplicate in the grooves a4 and a5,the former of said grooves being employed as a seat for the fasteningwire or band b4, which holds the cover l) in position upon the peripheryof the drum, and the other groove a5, running parallel with thefirst-mentioned groove, constitutes the lower wall of the peripheralhelical air-chamber @14.- The drum shown in Figs. 5 and 6 is provided atone of its ends with the hub d, the web a3, the tunnels a6, theairpockets a11, air-ports, air-ducts, and airvalves in substantially thesame manner as is the Wheel A. (Shown in Figs. 1 to'4, inclusive.) Theopposite end of the drum, however, is supported bya spider @15, havingsupporting-spokes passing from the hub a1 to the rim.

In use the polishing-wheel of my invention is mounted upon a mandrelcapable of rapid rotation, with the mouths of the funnels AG opening inthe direction of the rotation of the wheel. The cover B is secured inposition,

IOO

and in practice a polishing-band of fabric coated upon its outer facewith abrasive material is slipped over said cover. This band (not shown)constitutes the abrasive surface of the wheel. The rapid rotation of thepolishing-wheel causes the tunnels A(i to gather air, aportion of whichpasses directly through the ports A8 and escapes at the opposite side ofthe wheel. The other part of the current in each funnel, which isdivided by the rib A7, is directed through the air-port A9 into theair-pocket A11 on the opposite side of the web of the wheel. From thesepockets the air is forced by the pressure of air in the funnels throughthe air-ducts A12 into the peripheral air-space A14, passing andopeningthe valves A13. The polishing-drum illustrated in Figs. 5 and 6 isadapted to polish large flat surfaces.

The modified fastening for the cover B (illustrated in Fig. 7) isintended to be used where it is desirable to detach said cover from therim with greater facility than is afforded by the fastening illustratedin Fig. l.

I claim as my invention- 1. A pneumatic polishing-'wheel having anair-cushioned polishing-surface, a funnel for catching air as the wheelis rotated, an opening communicating between said funnel and theair-cushion, and an air-valve in said opening.

2. A pneumatic polishing-wheel having an air-cushioned peripheralpolishing-surface, a funnel on the body of said wheel for catching airas the wheel is rotated, and an opening communicating between saidfunnel and the j air-cushion.

3. Apneumatic polishing-wheel having an air-cushioned peripheralpolishing-surface, a funnel for catching air as the wheel is rotated, anopening in thewheel for permitting a portion of the air caught by thefunnel to escape, and an opening communicating between said funnel andsaid air-cushion.

4. A pneumatic polishing-wheelhaving an air-cushioned peripheralpolishing-surface, a funnel on the side of the ywheel for catching airas the wheel is rotated, a rib near the mouth of said funnel, an openingthrough the wheel near said rib, an opening communicating between saidfunnel and the air-cushion, and'an air-valve in said last-mentionedopening.

5. A pneumatic polishing-wheel having an air-cushioned peripheralpolishing-surface, a funnel on the side of the wheel for catching air asthe wheel is rotated, a rib near the mouth of said funnel, an openingthrough the wheel near said rib, an air-pocket in said wheel, anair-port between the funnel and the air-pocket, an air-ductcommunicating between said pocket and the air-cushion, and an air-valvefor said air-d uct.

6. A pneumatic polishing-wheel having an air-cushioned peripheralpolishing-surface, a funnel on the side of the wheel for catching air asthe wheel is rotated, a rib near the mouth of said funnel, an openingthrough the wheel near said rib, an air-pocket in said wheel, anair-port communicating between the funnel and the air-pocket, a valvefor said air-port in said air-pocket, an air-duct communicating betweenthe air-pocket and the air-cushion, and an air-valve in said airduct.

7. A pneumatic polishing-wheel having a hub, a rim and a web, said webhavingacircumferential groove, a cover for said groove, adapted to forman air-cushion, means for securing Said cover in position, a funnel onthe web of the wheel for catching air as the wheel is rotated, a ribnear the mouth of said funnel, for dividing the current of air, anopening through the web of the wheel near said rib, an air-pocket on theweb of the wheel substantially opposite the funnel, an air-portcommunicating between the funnel and the air-pocket, an air-valve insaid pocket for said port, an air-duct communicating between said pocketand the groove in the periphery of said wheel, and an air-valve for saidair-duct in said groove.

8. In a pneumatic polishing-wheel, in combination, a wheel having aperipheral rim; a peripheral rib at each side of said rim; a coveradapted to be secured over said ribs, to form an air-space between saidcover and said rim; a funnel for catching air as the wheel is rotated;and an air-duct communieating between said funnel and said air-space.

9. In a pneumatic polishing-wheel, in combination, a wheel having aperipheral rim; a peripheral rib at each side of said rim g' a coveradapted to be secured over said ribs, to form an air-space between saidcover and said rim; a funnel on the body of said wheel, for catching airas the wheel is rotated; an air-duct communicating between said funneland said air-space; and an air-valve for said air-duct.

ISAAC I). CADMAN.

Witnesses:

CHARLES OLIVER, F. OLEARY.

